The Roman-appointed Jewish king Agrippa II, who reigned over parts of Judea in the first century CE, once tried to count the male population of Israel. Because a direct census of Israel was forbidden — Scripture reminds us this is what brought plague in the days of David — he had to find another way.
He instructed the priests of the Temple to take careful note of every Pesach offering. Every Paschal lamb, as it was prepared, had its kidneys set aside and counted. The Talmud (Pesachim 64b) records what Agrippa learned: there were sixty myriads of couples — twelve hundred thousand lambs, offered for shared groups, the total of which came to double the number of men who had come up out of Egypt. And this count did not include those who were ceremonially unclean that year, or those who happened to be traveling and could not attend.
Since a single lamb was never shared by fewer than ten people, the arithmetic is staggering: more than twelve million Jews, the Rabbis conclude, converged on Jerusalem for that one Pesach. The city, which could not have held even a fraction of that number inside its walls, would have been surrounded by tents and campfires for miles.
The passage, preserved in the 1901 anthology Hebraic Literature, is more than a census note. It is a quiet argument. The Rabbis knew the destruction of the Temple was coming. They wanted the Jews of later centuries — scattered, exiled, small in number — to remember what the community had once looked like. An ocean of people, one lamb at a time, streaming toward a single city to eat the same meal on the same night. The arithmetic is a form of memory.